UNDER ARMOUR Sleeveless Tshirt for Men. BRAND NEW WITH TAGS!! Moisture wicking to keep moisture from skin to keep you dry and your body temperature consistent. Feels like cotton - performs like Under ARMOUR. Performance stretch for freedom of movement. Microfiber polyester for moisture management. Flat seams for durability and comfort. Part of the HeatGear collection. 95% polyester/5% spandex